利用激光烧蚀法制备表面等离子体可调谐的金核银壳层纳米颗粒胶体  

Tunable Surface Plasma Resonance Frequency in Au core/Ag shell Nanoparticles System Prepared by Laser Ablation

作　　者：吴海华[1] 方炎[1] 

机构地区：[1]北京市纳米光电子学重点实验室首都师范大学,北京100048

出　　处：《光散射学报》2008年第4期350-352,共3页The Journal of Light Scattering

摘　　要：利用激光烧蚀方法在水中制备了金核银壳层纳米颗粒胶体,发现这种复合胶体的等离子体振动吸收峰频率会随着激光烧蚀时间的不同而发生改变。利用等离子杂化理论定性解释了共振吸收峰可调谐的物理机制.A method for preparation of Au core/Ag shell nanoparticles with tunable surface plasma resonance （SPR） band was presented and studied. It was found that the tunable SPR band could be significantly conducted and achieved by laser ablation to Ag plate in Au colloidal solution, leading to the formation of Au core/Ag shell structure by the deposition of Ag atoms on the surface of Au nanopartieles. Then we explained the tunable surface plasma resonance （SPR） band with the plasmon- hybridization theory.

关 键 词：激光烧蚀 金核银壳结构 表面等离子体光吸收 杂化理论 

分 类 号：O657.32[理学—分析化学]